Shaitan is a succubus.
The succubus species' origin is incubus, and draining the target's essence through dreams can be called the succubus's foundation. And Shaitan, as a succubus who started from the bottom, through painstaking effort became able to claim the 4-star title of 'Madam.'
[You see, the succubus species can only absorb essence through the target's dreams. What happens if done directly? The efficiency is very low. Why go through such trouble? Just enter the target's dream, one shot, and come out.]
It was advice from a senior succubus Shaitan's father assigned. She taught Shaitan all debauchery techniques and sex magic a succubus could use, but never did it once in reality.
[Senior, why don't you experience it directly and only do it in dreams?]
